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Name
Date
Chapter Test
A
Class
CHAPTER 11
Complex Inheritance and Human Heredity
Part A: Multiple Choice
In the space at the left, write the letter of the term or phrase that best completes each statement
or answers each question.
1. Which defines an organism that is homozygous for a trait?
A. has two different alleles for a trait
B. has two different genes for a trait
C. has two of the same alleles for a trait
D. has two of the same genes for a trait
2. White-flowered plants crossed with red-flowered plants to produce
pink-flowered offspring is an example of
A. codominance.
B. complete dominance.
C. dominance.
D. incomplete dominance.
3. Which describes the 23 pairs of human chromosomes?
A. 1 autosome pair; 22 sex chromosome pairs
B. 1 sex chromosome pair; 22 autosome pairs
C. 2 autosome pairs; 21 sex chromosome pairs
D. 2 sex chromosome pairs; 21 autosome pairs
Part B: Matching
1. first appears in the person between ages 30–50 and
results in uncontrolled movements
A. albinism
B. Huntington’s disease
2. common among people of eastern European, Jewish descent
C. Tay-Sachs disease
3. creates white skin and hair
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Complex Inheritance and Human Heredity CHAPTER 11
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Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Write the letter of the correct human genetic disorder on the line next to its description.
Answers may be used only once.
Name
Date
Chapter Test
A
Class
CONTINUED
Part C: Interpreting Pedigrees
Use Figure 1 to answer each question.
)
1. Interpret What do the Roman numerals in the
pedigree diagram represent?
))
Figure 1 Tay-Sachs Disease Pedigree
2. Interpret How many of the offspring in this example are carriers for Tay-Sachs
disease?
Use Figure 2 to answer each question.
)
))
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
)))
Figure 2 Polydactyly Disorder Pedigree
3. Interpret What type of disorder does the pedigree above illustrate?
4. Interpret What are the gender and the possible genotypes represented by
a black circle?
Unit 3
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Name
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Chapter Test
A
Class
CONTINUED
Part D: Short Answer
Write your response to each statement in the space provided.
1. Explain how human blood types are determined by multiple alleles.
2. Describe sex-linked traits.
Part E: Concept Application
Write your response to each statement in the space provided.
1. Distinguish between a person who is a carrier for cystic fibrosis and a person
who is afflicted with cystic fibrosis. Include the term recessive genetic disorder
in your answer.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
2. Critique A science student states that the government should provide funding
to find a cure for people afflicted with Down syndrome. Critique the student’s
statement.
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Complex Inheritance and Human Heredity CHAPTER 11
Unit 3
Name
Date
Chapter Test
B
Class
CHAPTER 11
Complex Inheritance and Human Heredity
Part A: Multiple Choice
In the space at the left, write the letter of the term or phrase that best completes each statement
or answers each question.
1. Which is the correct expression of a heterozygous genotype for a recessive genetic disorder?
A. a
B. A
C. aa
D. Aa
2. A dominant genetic disorder will be expressed if an individual has
A. one allele for the disorder.
B. one gene for the disorder.
C. two alleles for the disorder.
D. two genes for the disorder.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
3. Which is a Barr body?
A. activated X chromosome
B. activated Y chromosome
C. inactivated X chromosome
D. inactivated Y chromosome
4. A large difference between the concordance rates of fraternal and identical twins
shows
A. a strong environmental influence.
B. a strong genetic influence.
C. no environmental influence.
D. no genetic influence.
Part B: Matching and Completion
Matching Write the letter of the correct human genetic disorder on the line next to its
symptoms. Answers may be used only once or not at all.
1. a 40-year old male who experiences neurological dysfunction
A. achondroplasia
2. wears down the nervous system of a three-year-old child
B. albinism
3. an absence of pigments in the skin, hair, and eyes
C. cystic fibrosis
4. stunts growth to a maximum of 1.2 m
D. Down syndrome
5. prevents cells from absorbing chloride ions
E. Huntington’s disease
F. Tay-Sachs disease
Unit 3
CHAPTER 11 Complex Inheritance and Human Heredity
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Name
Date
Chapter Test
B
Class
CONTINUED
Completion Write the correct term in the blank to complete each sentence below.
6. A person who is a heterozygous for a recessive genetic disorder is called a(n)
.
7. An intermediate phenotype between two homozygous phenotypes is called
.
8. One allele masking the effect of a second allele is called
.
9. Chromosome pairs that are not sex chromosomes are called
.
10. The diversity of human eye color can be explained by understanding
.
)
Part C: Interpreting Pedigrees
))
Use Figure 1 to answer each question.
1. Interpret What are the genotypes of the parents
in this diagram?
Figure 1 Tay-Sachs Disease Pedigree
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
2. Interpret If a person who does not carry the Tay-Sachs disease gene marries
offspring II4, what are the possible genotypes for their children?
)
))
)))
Figure 2 Polydactyly Disorder Pedigree
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Complex Inheritance and Human Heredity CHAPTER 11
Unit 3
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B
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CONTINUED
Use Figure 2 on the previous page to respond to each statement.
3. Identify the second-generation females who are homozygous recessive for
this disorder.
4. Infer the genotype of the first-generation female. Explain.
Part D: Short Answer
Write your response to each statement in the space provided.
1. Infer the possible genotypes of people afflicted with sickle-cell anemia.
Describe their phenotypes.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
2. Explain the possible human blood types based on the multiple forms of alleles
for the blood-type trait.
Part E: Concept Application
Write your response to each statement in the space provided.
1. Infer A Jewish couple is about to be married, but they both worry about their
family history. The man’s uncle and the woman’s aunt died of Tay-Sachs disease.
Infer why the couple is hiring a genetic counselor to analyze their family’s pedigree.
2. Critique During a science lecture, a student states that human females cannot
be red-green color blind because color blindness is a sex-linked trait. Critique the
student’s statement.
Unit 3
CHAPTER 11 Complex Inheritance and Human Heredity
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Name
Date
Chapter Test
C
Class
CHAPTER 11
Complex Inheritance and Human Heredity
Part A: Multiple Choice
In the space at the left, write the letter of the term, phrase, or sentence that best answers
each question.
1. Which is a dominant genetic disorder?
A. achondroplasia
B. albinism
C. galactosemia
D. hemophilia
2. Which disorder prevents sufficient chloride ions from entering cells?
A. albinism
B. galactosemia
C. cystic fibrosis
D. Down syndrome
3. What is the effect of sickle-cell anemia?
A. blocked respiratory pathways
B. decreased neurological functions
C. inefficient oxygen transportation
D. susceptibility to contracting malaria
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
4. What is the genotype of a woman with red-green color blindness?
A. Xb Xb
B. X B X B
C. Xb Y
D. X B Y
5. How can the genetic disorder known as hemophilia be defined?
A. dominant, sex-linked disorder common to females
B. dominant, sex-linked disorder common to males
C. recessive, sex-linked disorder common to females
D. recessive, sex-linked disorder common to males
6. Why is Down syndrome called trisomy 21?
A. The person has 21 pairs of chromosomes instead of 23.
B. The person has an abnormal gene on chromosome 21.
C. The syndrome is caused by having 21 pairs of autosomes.
D. The syndrome results from an extra chromosome 21.
Part B: Completion
Write the correct term in the blank to complete each sentence below.
1. A person who is a heterozygous for albinism is called a(n)
.
2. An intermediate heterozygous phenotype between two homozygous phenotypes is called
.
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CONTINUED
3.
occurs when the recessive allele for no pigment masks the
dominant allele for dark color in Labrador retrievers.
4. The wide diversity of human height is an example of traits called
.
5. The percentage of identical twins that both have a given trait is called a(n)
.
6. The fetal test for genetic disorders performed after 15 weeks of pregnancy is called
.
)
Part C: Interpreting Pedigrees
Use Figure 1 to respond to each statement.
1. Identify the genotypes of the offspring in
this diagram.
))
Figure 1 Tay-Sachs Disease Pedigree
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
2. Infer the possible genotypes and phenotypes of children born to a marriage
between II4 and a carrier of the disease.
Use Figure 2 on the next page to respond to each statement.
3. Identify the genotypes of the following individuals: I2, II2, II3, and II4.
4. Infer the possible genotypes and phenotypes of the children of person II5 who
marries a heterozygous partner for the disorder.
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Name
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Chapter Test
C
Class
CONTINUED
)
))
)))
Figure 2 Polydactyly Disorder Pedigree
Part D: Short Answer
Write your response to each statement in the space provided.
1. Explain the purpose of analyzing pedigrees.
2. Compare and contrast X and Y chromosomes.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Part E: Concept Application
Write your response to each statement in the space provided.
1. Infer A homozygous red bull is mated with a homozygous white cow. The offspring
have red and white hairs interspersed in their coats. Infer the inheritance pattern of
the cattle. Explain.
2. Infer A child is born with type A blood. Infer the possible genotypes of the
child’s parents.
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Complex Inheritance and Human Heredity CHAPTER 11
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